> For the complete documentation index, see [llms.txt](https://docs.antsomi.com/cdp-365-user-guide-en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.antsomi.com/cdp-365-user-guide-en/use-cases/personas/visitors-customers/how-to-create-a-customer-custom-attribute.md).
# How to create a Customer Custom Attribute
## Use case:
You want to create an attribute that stored the date of birth information of a customer. It is in the Customer Information Group
## Steps:
You can follow these steps below in order to create a Customer Custom Attribute - **Date of birth**:
1. Hover your mouse over **Data** (on the left hand side menu), then click **Data Object** and select **Customer**
2\. Select **Attributes** on the left hand side, click **+** button, and then select **Create new Attribute**
3. At the Create a new attribute interface, choose **Custom Attribute**
4\. **Configure** the **Date of birth** attribute:
* **General Information**:
* Group attribute: Customer Information
* Attribute name: Date of birth
* Attribute internal code: date\_of\_birth
* Description: The month, day, and year a person was born
* **Setting**:
* Data type: Datetime
* Display Format: Datetime
5\. Click 
## Guidance Video
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